I have a 1992 bonne SE and I can not figure out for the life of me what type of refrigerant it uses. R12 or R134a?

R12, unless it'* been converted already.

Anyway I could find this out (converted already)

Not unless it was clearly marked when done. I don't suggest tasting it

When did they start using r134A Do you know?

If it has been converted the connections on the condenser will be snap on ones like a air hose has if they are the screw on type it is R12. I know my wifes old 93 tercel was 134a but I am not sure when GM switched their cars to R134a.

Is the system empty or are you just trying to make it colder. If it is empty you could switch it over very easy and it would be alot cheaper. Plus you can't even buy R12 with out a licence and then it is really expensive where a can of R134a at you local wal-mart is about $5.

That is the thing. They screw on but still resemmble the Air hose attachment features
Almost like both connectors were built it to one. No stickers state what type it uses. And My wifes 93 grand caravan uses 134a so I have a bunch left over and wanted to maybe recharge mine alittle but it does not look like it favors either or connector.

if its ever ben retrofited buy a shop it will have an 'unremovable' sticker on eighter strut tower?

Well, Iguess it is just R12. OH Well, I was hoping to go the cheaper route.

The R134a will be like a air hose on the out side but threaded on the inside.

Do you know if the system is empty? You can check by pressing the pin inside the connection kinda like letting air out of a tire. If it doesn't let any pressure off it is empty.